CN107966351A - A kind of method for carrying out parcel processing to sample using nickel screen - Google Patents
A kind of method for carrying out parcel processing to sample using nickel screen Download PDFInfo
- Publication number
- CN107966351A CN107966351A CN201711156738.7A CN201711156738A CN107966351A CN 107966351 A CN107966351 A CN 107966351A CN 201711156738 A CN201711156738 A CN 201711156738A CN 107966351 A CN107966351 A CN 107966351A
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- sample
- nickel screen
- carrying
- fixture
- parcel processing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of method for carrying out parcel processing to sample using nickel screen, including：Two panels nickel screen is symmetrically wrapped into sample；Wrapped sample is put into the fixture to match with the shape of sample；The fixture that clamping has sample is placed in tablet press machine and carries out punching press；After the completion of punching press, the sample in fixture is taken out；Sample after processing carries out the welding of thermocouple wire on mash welder, and pad falls on nickel screen.The present invention is good due to the weldability of nickel and nickel alloy, nickel screen has made sample portion envelops processing, and nickel screen is tightly pasted with specimen surface after cold pressing, thermocouple wire is welded on nickel screen, instead of being welded on sample, solve the problems, such as the thermometric of the material of solderability difference, thermal modeling test is accurately carried out, improve success of the test rate.Apparatus of the present invention is simple, reduces experimentation cost, easy to operation.
Description
Technical field
The present invention relates to heat simulating technical field, and sample is carried out at parcel using nickel screen more particularly to one kind
The method of reason.
Background technology
Material processing physical simulation techniques because it effectively and reduce expenses, be widely used in investigation of materials and open
Hair and manufacture field.Wherein, the accurate measurement during experiment to thermal simulation sample temperature is key whether success of the test successfully, is led to
Thermocouple wire is connected on steel material sample with spot welding machine in the case of often, solder joint is firm, and thermometric is accurate；However, when simulation
The sample of experiment be aluminium, copper, magnesium when material, since resistivity is low, thermocouple wire is difficult to firmly weld with sample, causes to test
Frequently fail and can not carry out, while constrain the application range of hot modeling test machine.
Publication No. CN105651618A, it is entitled《A kind of method that thermocouple wire is configured to sample》Chinese invention
Patent, solves the problems, such as to weld thermocouple wire on the material of weldability difference to a certain extent, but sample exists in this method
In deformation process, the pad of two thermocouple wires is easily opened, so that thermometric fails, success of the test rate is not high.
The content of the invention
To solve problems of the prior art, parcel processing is carried out to sample using nickel screen the present invention provides one kind
Method, it is easy to operate, substantially increase success of the test rate, reduce experimentation cost, expanded heat simulating tester should
Use scope.
The present invention provides a kind of method for carrying out parcel processing to sample using nickel screen, including：
1) sample is symmetrically wrapped using two panels nickel screen；
2) wrapped sample is put into the fixture to match with the shape of sample；
3) fixture that clamping has sample is placed in tablet press machine and carries out punching press；
4) after the completion of punching press, the sample in fixture is taken out；
5) sample after handling carries out the welding of thermocouple wire on mash welder, and pad falls on nickel screen.
Further, in the step 1), the sample is cylinder, by the two panels nickel screen relatively symmetrically around sample
Circumferential that sample is wrapped up, every nickel screen wraps the half cycle of sample.
3rd, a kind of method for carrying out parcel processing to sample using nickel screen as claimed in claim 2, it is characterised in that will
The nickel screen is wrapped in the axial centre position of sample.
Further, the width of the nickel screen of selection is 1~2mm, and length is more than the half of the outer perimeter of sample.
Further, the surface density of the nickel screen of selection is more than 280g/ ㎡, and hole count is more than 100PPI, and thickness is more than 1.7mm.
Further, in the step 2), the fixture is had the fixture block group of semicircle shape perforate by two pieces of opposite centres
Into the radius of the semicircle shape perforate and the radius of sample match.
Further, the fixture block is cuboid, and 4 times of the length of radius of specimen, width is 2 times of radius of specimen,
Highly it is 2 times of radius of specimen, the semicircle shape perforate is located on the big face of the fixture block.
Further, in the step 3), carry out using fixation pressure during punching press, the fixation pressure is less than sample material
Yield strength Rp0.2 80%.
Further, in the step 5), the thermocouple wire is K-type thermocouple, and the voltage of the welding thermocouple is
20~40V.
Further, the sample is compressed axially sample, or bar-shaped tensile sample for cylinder.
For the present invention since the weldability of nickel and nickel alloy (K-type thermocouple) is good, nickel screen has made sample portion envelops processing,
And nickel screen is tightly pasted with specimen surface after cold pressing, thermocouple wire is welded on nickel screen, instead of being welded on sample, is solved
The thermometric problem of the material of solderability difference, allows thermal modeling test accurately to carry out, improves success of the test rate.The present invention uses
Tool is simple, reduces experimentation cost, easy to operation.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Fig. 1 is the side schematic view of the sample after the parcel processing of the embodiment of the present invention；
Fig. 2 is the front schematic view of the sample after the parcel processing of the embodiment of the present invention；
Fig. 3 is the front view of the fixture of the embodiment of the present invention；
Fig. 4 is the top view of the fixture of the embodiment of the present invention；
Fig. 5 is that the parcel processing of the embodiment of the present invention is contrasted with not wrapping up the stress-strain diagram of processing welding aluminium sample
Figure；
Fig. 6 is that the parcel processing of the embodiment of the present invention is contrasted with not wrapping up the stress-strain diagram of processing welding steel curved beam
Figure；
Fig. 7 is a kind of flow chart of method for carrying out parcel processing to sample using nickel screen of the embodiment of the present invention.
Embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
An embodiment of the present invention provides a kind of method for carrying out parcel processing to sample using nickel screen, as shown in fig. 7, bag
Include：
Step S1, sample is symmetrically wrapped using two panels nickel screen.As depicted in figs. 1 and 2, the sample 1 is cylinder, will
The two panels nickel screen 2 relatively symmetrically wraps up sample around the circumferential direction of sample 1, and every nickel screen 2 wraps the half cycle of sample 1.
Preferably, the nickel screen 2 is wrapped in the axial centre position of sample 1, the width of the nickel screen 2 of selection is 1~2mm, length
More than the half of the outer perimeter of sample 1, the surface density of the nickel screen 2 of selection is more than 280g/ ㎡, and hole count is more than 100PPI, and thickness is big
In 1.7mm.The sample 1 is compressed axially sample, or bar-shaped tensile sample for cylinder.
Step S2, wrapped sample is put into the fixture to match with the shape of sample.As shown in Figure 3 and Figure 4, institute
State fixture to be made of the fixture block that two pieces of opposite centres have semicircle shape perforate, the radius of the semicircle shape perforate and the half of sample
Footpath matches.Preferably, the fixture block is cuboid, and 4 times of the length of radius of specimen, width is 2 times of radius of specimen, high
Spend for 2 times of radius of specimen, the semicircle shape perforate is located on the big face of the fixture block.
Step S3, the fixture that clamping has sample is placed in tablet press machine and carries out punching press.Wherein, carry out using during punching press and fix
Pressure, the fixation pressure are less than the 80% of the yield strength Rp0.2 of sample material.
Step S4, after the completion of punching press, takes out the sample in fixture.
Step S5, the sample after processing carry out the welding of thermocouple wire on mash welder, and pad falls on nickel screen.Its
In, the thermocouple wire is K-type thermocouple, and the voltage of the welding thermocouple is 20~40V.
For the present invention since the weldability of nickel and nickel alloy (K-type thermocouple) is good, nickel screen has made sample portion envelops processing,
And nickel screen is tightly pasted with specimen surface after cold pressing, thermocouple wire is welded on nickel screen, instead of being welded on sample, is solved
The thermometric problem of the material of solderability difference, allows thermal modeling test accurately to carry out, improves success of the test rate.The present invention uses
Tool is simple, reduces experimentation cost, easy to operation.
In a specific embodiment one of the invention, 7075 aluminium alloys of component such as table 1 are processed into 10 × 15mm's of Φ
Cylinder sample；The yield strength Rp0.2 for measuring the alloy under room temperature on universal testing machine first is 455Mpa, is width by specification
The two panels nickel screen of 2mm, long 25mm in the sample between part circumferentially wrapped up rotating around sample, after parcel in the fixture, institute
The size for stating fixture is 20mm × 10mm × 10mm, and the semicircle radius of cutting is 5mm, is placed on tablet press machine, sets tablet press machine pressure
Power 10Mpa, after the completion of pressure, takes out sample out of fixture, is placed on progress thermocouple wire welding under mash welder, weldingvoltage selection
30V, checks after welding and confirms firm welding, high temperature compressed experiment is carried out on Gleeble-1500D hot modeling test machines；It is first
First, it is evacuated to less than 10Pa, with 2 DEG C/s heating samples to 450 DEG C, then keeps the temperature 60 seconds, it is true with the deformation of 0.1/s strain rates
Strain 0.9, smoothly completes experiment, for stress-strain diagram as shown in a lines in Fig. 5, line smoothing is flat.Phase same material sample exists
Directly welding thermocouple is not wrapped up in the case of nickel screen, and b in stress-strain diagram such as Fig. 5 is carried out after thermal simulation experiment by above-mentioned technique
Shown in lines, curve is acutely shaken, the reason is that the thermocouple wire solder joint of welding loosens, thermometric is not allowed to cause with temperature control.So can
To find out that the pad of parcel processing is solid and reliable.
The chemical composition of 1 7075 aluminium alloy of table
In a specific embodiment two of the invention, the cylinder that the medium managese steel of component such as table 2 is processed into 8 × 15mm of Φ tries
Sample；The yield strength Rp0.2 for measuring the alloy under room temperature on universal testing machine first is 674Mpa, is width 2mm by specification, long
The two panels nickel screen of 20mm in the sample between part circumferentially wrapped up rotating around sample, after parcel in the fixture, the fixture
Size is 16mm × 8mm × 8mm, and the semicircle radius of cutting is 4mm, is placed on tablet press machine, sets tablet press machine pressure 10Mpa, applies
After the completion of pressure, sample is taken out out of fixture, is placed on progress thermocouple wire welding under mash welder, weldingvoltage selection 40V, after welding
Check and confirm firm welding；High temperature compressed experiment is carried out on Gleeble-1500D hot modeling test machines；First, it is evacuated to
Less than 10Pa, with 10 DEG C/s heating samples to 900 DEG C, 300 seconds then are kept the temperature, true strain 0.4 is deformed with 1/s strain rates, it is suitable
Profit completes experiment, and stress-strain diagram is as shown in c lines in Fig. 6.Phase same material sample directly welds in the case of nickel screen is not wrapped up
Thermocouple is connect, after carrying out thermal simulation experiment as above-mentioned technique in stress-strain diagram such as Fig. 6 shown in d lines, crucial point data pair
Such as table 3, it can be seen that wrap up the pad thermometric of processing more accurately and reliably.
The chemical composition of 2 manganese steel of table
3 key point data comparison table of table
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
- A kind of 1. method for carrying out parcel processing to sample using nickel screen, it is characterised in that including：1) sample is symmetrically wrapped using two panels nickel screen；2) wrapped sample is put into the fixture to match with the shape of sample；3) fixture that clamping has sample is placed in tablet press machine and carries out punching press；4) after the completion of punching press, the sample in fixture is taken out；5) sample after handling carries out the welding of thermocouple wire on mash welder, and pad falls on nickel screen.
- A kind of 2. method for carrying out parcel processing to sample using nickel screen as claimed in claim 1, it is characterised in that the step It is rapid 1) in, the sample for cylinder, circumferential direction of the two panels nickel screen relatively symmetrically around sample wraps up sample, every Nickel screen wraps the half cycle of sample.
- 3. a kind of method for carrying out parcel processing to sample using nickel screen as claimed in claim 2, it is characterised in that by described in Nickel screen is wrapped in the axial centre position of sample.
- 4. a kind of method for carrying out parcel processing to sample using nickel screen as claimed in claim 2, it is characterised in that selection The width of nickel screen is 1~2mm, and length is more than the half of the outer perimeter of sample.
- 5. a kind of method for carrying out parcel processing to sample using nickel screen as claimed in claim 2, it is characterised in that selection The surface density of nickel screen is more than 280g/ ㎡, and hole count is more than 100PPI, and thickness is more than 1.7mm.
- A kind of 6. method for carrying out parcel processing to sample using nickel screen as claimed in claim 1, it is characterised in that the step It is rapid 2) in, the fixture by two pieces of opposite centres have semicircle shape perforate fixture block form, the radius of the semicircle shape perforate Match with the radius of sample.
- A kind of 7. method for carrying out parcel processing to sample using nickel screen as claimed in claim 6, it is characterised in that the folder Block is cuboid, 4 times of the length of radius of specimen, and width is 2 times of radius of specimen, highly 2 times for radius of specimen, described Semicircle shape perforate is located on the big face of the fixture block.
- A kind of 8. method for carrying out parcel processing to sample using nickel screen as claimed in claim 1, it is characterised in that the step It is rapid 3) in, carry out use fixation pressure during punching press, 80% of the fixation pressure less than the yield strength Rp0.2 of sample material.
- A kind of 9. method for carrying out parcel processing to sample using nickel screen as claimed in claim 1, it is characterised in that the step It is rapid 5) in, the thermocouple wire is K-type thermocouple, it is described welding thermocouple voltage be 20~40V.
- 10. a kind of method for carrying out parcel processing to sample using nickel screen as claimed in any one of claims 1-9 wherein, its feature It is, the sample is compressed axially sample, or bar-shaped tensile sample for cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711156738.7A CN107966351B (en) | 2017-11-20 | 2017-11-20 | Method for wrapping sample by using nickel net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711156738.7A CN107966351B (en) | 2017-11-20 | 2017-11-20 | Method for wrapping sample by using nickel net |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107966351A true CN107966351A (en) | 2018-04-27 |
| CN107966351B CN107966351B (en) | 2020-07-14 |
Family
ID=62000315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711156738.7A Active CN107966351B (en) | 2017-11-20 | 2017-11-20 | Method for wrapping sample by using nickel net |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770081A (en) * | 1980-10-20 | 1982-04-30 | Hitachi Ltd | Brazing method |
| CN202720067U (en) * | 2012-06-06 | 2013-02-06 | 沈阳飞机工业（集团）有限公司 | Thermocouple for pipe braze welding |
| CN104014897A (en) * | 2014-06-11 | 2014-09-03 | 沈阳飞机工业（集团）有限公司 | Metal conduit welding technology control method |
| CN104155166A (en) * | 2014-08-29 | 2014-11-19 | 山西太钢不锈钢股份有限公司 | Preparation and determination method of sample for compression of metal material with high thermal conductivity |
| CN105651618A (en) * | 2016-03-01 | 2016-06-08 | 内蒙古科技大学 | Method for disposing thermocouple wires on test specimen |
-
2017
- 2017-11-20 CN CN201711156738.7A patent/CN107966351B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770081A (en) * | 1980-10-20 | 1982-04-30 | Hitachi Ltd | Brazing method |
| CN202720067U (en) * | 2012-06-06 | 2013-02-06 | 沈阳飞机工业（集团）有限公司 | Thermocouple for pipe braze welding |
| CN104014897A (en) * | 2014-06-11 | 2014-09-03 | 沈阳飞机工业（集团）有限公司 | Metal conduit welding technology control method |
| CN104155166A (en) * | 2014-08-29 | 2014-11-19 | 山西太钢不锈钢股份有限公司 | Preparation and determination method of sample for compression of metal material with high thermal conductivity |
| CN105651618A (en) * | 2016-03-01 | 2016-06-08 | 内蒙古科技大学 | Method for disposing thermocouple wires on test specimen |
Non-Patent Citations (2)
| Title |
|---|
| 夏征农: "《大辞海 机械电气卷》", 31 December 2007, 上海辞书出版社 * |
| 美）R.A.林德伯N.R.布拉顿: "《焊接及其它连接方式》", 30 September 1983, 科学技术文献出版社重庆分社 * |
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|---|---|
| CN107966351B (en) | 2020-07-14 |
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